PartsTable
Technical Data Sheet
Download PDF

N239W20 — REDUCER BODY,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

N239W20: REDUCER BODY,TUBE.

The REDUCER BODY,TUBE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2017, flange_width: 1.990 INCHES NOMINAL IN, overall_length: 0.770 INCHES NOMINAL IN, style_designator: REDUCER BODY, end_item_identification: B-1B AIRCRAFT, flange_outside_diameter: 1.990 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-170-7051, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
N239W20
NSN: 4730-01-170-7051
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 79326 — TRANSDIGM INC DIV ADELWIGGINS GROUP (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2017
flange_width1.990 INCHES NOMINAL IN
overall_length0.770 INCHES NOMINAL IN
style_designatorREDUCER BODY
end_item_identificationB-1B AIRCRAFT
flange_outside_diameter1.990 INCHES NOMINAL IN
first_end_seat_angle_in_deg37.5
second_end_seat_angle_in_deg37.5
hose_inside_diameter_for_which_designed1.250 INCHES NOMINAL IN
tube_outside_diameter_for_which_designed1.500 INCHES NOMINAL IN
NSN4730-01-170-7051
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: N239W20 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
HOSE INSIDE DIAMETER FOR WHICH DESIGNED: 1.250 INCHES NOMINAL IN
•
SECOND END SEAT ANGLE IN DEG: 37.5
•
FIRST END SEAT ANGLE IN DEG: 37.5
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 1.500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: REDUCER BODY
•
FLANGE WIDTH: 1.990 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
HOSE INSIDE DIAMETER FOR WHICH DESIGNED1.250 INCHES NOMINAL IN
SECOND END SEAT ANGLE IN DEG37.5
FIRST END SEAT ANGLE IN DEG37.5
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED1.500 INCHES NOMINAL IN
STYLE DESIGNATORREDUCER BODY
OVERALL LENGTH0.770 INCHES NOMINAL IN
FLANGE WIDTH1.990 INCHES NOMINAL IN
END ITEM IDENTIFICATIONB-1B AIRCRAFT
MATERIALALUMINUM ALLOY 2017
FLANGE OUTSIDE DIAMETER1.990 INCHES NOMINAL IN
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)Demilitarization required — critical (Q)
Ready to buy N239W20?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is N239W20?
N239W20 is a REDUCER BODY,TUBE.
What is the NSN for N239W20?
N239W20 is cataloged in the U.S. Government catalog under NSN 4730-01-170-7051. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — N239W20

✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.